Use the Information Below as Background for the Following Questions

question 20

Multiple Choice

Use the information below as background for the following questions.
Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus.
-Some pathogens can undergo rapid changes resulting in antigenic variation. Which of the following is such a pathogen?

• A)the influenza virus, which expresses alternative envelope proteins
• B)the strep bacteria, which can be communicated from patient to patient with high efficiency
• C)human papilloma virus, that can remain latent for several years
• D)the causative agent of an autoimmune disease such as rheumatoid arthritis
• E)multiple sclerosis, that attacks the myelinated cells of the nervous system

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Definitions:

Insight Learning

A form of problem-solving where the solution suddenly comes to an individual in what appears to be a moment of clarity, often called an "aha" moment.

Aha! Experience

A moment of sudden insight or discovery, often characterized by a feeling of joy or satisfaction when understanding a previously incomprehensible problem or concept.

Token Economy

A behavior modification system used in psychological treatments, where desired behaviors are reinforced with tokens that can be exchanged for various rewards.

Socially Desirable Behavior

Actions that are seen as favorable or acceptable by society and are often performed by individuals to be viewed positively by others.